The restriction enzyme EcoRI recognizes the sequence GAATTC; therefore, it will ____ whenever it encounters this
sequence.
a. paste the DNA molecule
b. cut the DNA molecule
c. break the hydrogen bonds holding the two DNA strands together
d. replicate the DNA
e. transcribe the DNA
ANSWER: b
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Because of its association with tools, the earliest human was called ____________ meaning "handy man."
A. Homo habilis B. Homo erectus C. Homo sapiens D. Neanderthal E. Cro-Magnon
Tall (D) is dominant to dwarf (d). If a true-breeding tall plant is crossed with a true-breeding dwarf plant, give the
genotypic and phenotypic ratios of the F2 generation. What will be an ideal response?
Once in the respiratory tract, the flu virus targets cells based on specific glycoproteins on their surfaces. How does the virus gain entry into the target cell?
A. Viruses are made up of lipids and can therefore diffuse through the membrane of target cells, gaining entry. B. Glycoproteins within the virus structure bind with glycoproteins on the membrane of the target cell and the virus squeezes through the glycoprotein into the cell. C. The H spikes of the influenza virus break down the cell wall, allowing the virus to gain entry. D. The N spikes of the influenza virus help break down the plasma membrane of a cell, allowing entry of the virus into the cell.
In which way are NADH and FADH2 related?
a. They both carry high-energy phosphates. b. They both carry high-energy electrons. c. They are both used in glycolysis. d. They both directly produce ATP.